Create Mojo service for locking/unlocking screen orientation.

content/renderer/screen_orientation/screen_orientation_dispatcher.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_H_
 #define CONTENT_RENDERER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_H_
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/macros.h"
-#include "content/public/renderer/render_frame_observer.h"
+#include "content/common/content_export.h"
+#include "content/common/screen_orientation_service.mojom.h"
 #include "third_party/WebKit/public/platform/WebLockOrientationCallback.h"
 #include "third_party/WebKit/public/platform/WebScreenOrientationClient.h"
 #include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
 #include "third_party/WebKit/public/platform/WebScreenOrientationType.h"
 
 namespace content {
 
-class RenderFrame;
+class ServiceRegistry;
 
 // ScreenOrientationDispatcher implements the WebScreenOrientationClient API
 // which handles screen lock. It sends lock (or unlock) requests to the browser
 // process and listens for responses and let Blink know about the result of the
 // request via WebLockOrientationCallback.
 class CONTENT_EXPORT ScreenOrientationDispatcher :
-    public RenderFrameObserver,
     NON_EXPORTED_BASE(public blink::WebScreenOrientationClient) {
  public:
-  explicit ScreenOrientationDispatcher(RenderFrame* render_frame);
+  explicit ScreenOrientationDispatcher(
+      ScreenOrientationService* screen_orientation_service);
   virtual ~ScreenOrientationDispatcher();
 
  private:
   friend class ScreenOrientationDispatcherTest;
 
-  // RenderFrameObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-
   // blink::WebScreenOrientationClient implementation.
   virtual void lockOrientation(
       blink::WebScreenOrientationLockType orientation,
       blink::WebLockOrientationCallback* callback) OVERRIDE;
   virtual void unlockOrientation() OVERRIDE;
 
-  void OnLockSuccess(int request_id);
-  void OnLockError(int request_id,
-                   blink::WebLockOrientationError error);
+  void OnLockOrientationResult(int request_id,
+                               ScreenOrientationLockResult result);
 
   void CancelPendingLocks();
 
   // The pending_callbacks_ map is mostly meant to have a unique ID to associate
   // with every callback going trough the dispatcher. The map will own the
   // pointer in the sense that it will destroy it when Remove() will be called.
   // Furthermore, we only expect to have one callback at a time in this map,
   // which is what IDMap was designed for.
   typedef IDMap<blink::WebLockOrientationCallback, IDMapOwnPointer> CallbackMap;
   CallbackMap pending_callbacks_;
+  ScreenOrientationService* screen_orientation_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenOrientationDispatcher);
 };
 
 }  // namespace content
 
 #endif // CONTENT_RENDERER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_DISPATCHER_H_